All calculators
1004 free calculators across 20 categories.
Math
Percentage Calculator
Find what X% of a number is, instantly.
Percentage Increase Calculator
Calculate the percent change between two values.
Percentage Difference Calculator
Compare two values as a percentage difference.
Average Calculator
Find the mean, median, min and max of a list.
Square Root Calculator
Find the square root of any number.
Fraction Calculator
Add, subtract, multiply or divide two fractions.
Ratio Calculator
Simplify a ratio and scale it proportionally.
GCF Calculator
Find the greatest common factor of numbers.
LCM Calculator
Find the least common multiple of numbers.
Scientific Calculator
Apply scientific functions to any number.
Standard Deviation Calculator
Calculate the standard deviation, variance, and mean of a data set.
Mean, Median & Mode Calculator
Find the mean, median, mode, range, and sum of any data set instantly.
Z-Score Calculator
Calculate the z-score (standard score) to see how many standard deviations a value is from the mean.
Combinations Calculator (nCr)
Calculate the number of ways to choose r items from a set of n items, where order doesn't matter.
Probability Calculator
Calculate the probability of an event occurring given favorable and total outcomes.
Factorial Calculator (n!)
Calculate the factorial of any non-negative integer. See results for large values too.
Exponent Calculator
Calculate base raised to a power (bⁿ). Handles any real exponent including fractions and negatives.
Logarithm Calculator
Calculate the logarithm of any number to any base, including natural log (ln) and log base 10.
Modulo Calculator
Calculate the remainder of a division operation (a mod b) with the quotient.
Percent Error Calculator
Compare a measured value to the true value.
Scientific Notation Calculator
Convert any number to scientific notation.
Slope Calculator
Find the slope of a line through two points.
Distance Between Two Points Calculator
Find the straight-line distance between two points.
Midpoint Calculator
Find the midpoint between two coordinate points.
Arithmetic Sequence Calculator
Find the nth term and sum of a sequence.
Quadratic Formula Calculator
Solve ax² + bx + c = 0 for both roots.
Pythagorean Theorem Calculator
Find the hypotenuse of a right triangle.
Circle Calculator
Find area, circumference, and diameter from the radius.
Triangle Area Calculator
Find a triangle's area from base and height.
Permutations Calculator
Count ordered arrangements with nPr.
Prime Factorization Calculator
Break a number into its prime factors.
Cube Root Calculator
Find the cube root of any number.
Proportion Calculator
Solve a/b = c/x for the missing value.
Rounding Calculator
Round a number to any decimal place.
Linear Interpolation Calculator
Estimate a value between two known points.
Rectangle Area Calculator
Find the area and perimeter of a rectangle.
Sphere Volume Calculator
Find the volume and surface area of a sphere.
Cylinder Volume Calculator
Find the volume and surface area of a cylinder.
Cone Volume Calculator
Find the volume of a cone from its radius and height.
Trapezoid Area Calculator
Find the area of a trapezoid from its bases and height.
Harmonic Mean Calculator
Find the harmonic mean of three numbers.
Exponential Growth Calculator
Project a value growing at a fixed percentage rate.
Percentage of Total Calculator
Find what percentage one number is of another.
Consecutive Integer Sum Calculator
Sum all whole numbers from a start to an end.
Golden Ratio Calculator
Split a length into the golden ratio proportions.
Vector Magnitude Calculator
Find the length and direction of a 2D or 3D vector.
2×2 Matrix Determinant Calculator
Compute the determinant of a 2×2 matrix.
Number Base Converter
Convert numbers between binary, octal, decimal and hex.
Absolute Value Calculator
Find the absolute value and distance on a number line.
Significant Figures Calculator
Round a number to a chosen number of significant figures.
Fibonacci Calculator
Find the nth Fibonacci number and the running sum.
Geometric Sequence Calculator
Find the nth term and sum of a geometric sequence.
Confidence Interval Calculator
Find the confidence interval for a sample mean.
Margin of Error Calculator
Find the margin of error for a survey proportion.
Linear Regression Calculator
Fit a best-fit line and correlation to paired data.
Unit Rate Calculator
Find the rate per single unit from a total.
Dot Product Calculator
Find the dot product and angle between two vectors.
Law of Sines Calculator
Solve a triangle from two angles and one side.
Law of Cosines Calculator
Find the third side from two sides and the included angle.
Variance Calculator
Find the variance, standard deviation and mean of data.
Covariance Calculator
Find the covariance between two paired variables.
Weighted Mean Calculator
Find the weighted average of values with weights.
Geometric Mean Calculator
Find the geometric mean of a set of positive numbers.
Percentile Calculator
Find the value at a given percentile in a data set.
Quartile Calculator
Find Q1, Q2, Q3 and the interquartile range.
Sample Size Calculator
Find the survey sample size for a target margin of error.
Binomial Probability Calculator
Find the probability of k successes in n trials.
Poisson Distribution Calculator
Find the probability of k events given an average rate.
Expected Value Calculator
Find the expected value from outcomes and probabilities.
Odds to Probability Calculator
Convert odds into probability and decimal odds.
Coefficient of Variation Calculator
Find relative variability as a percentage of the mean.
Interquartile Range Calculator
Find the IQR and outlier fences of a data set.
Ellipse Area Calculator
Find the area and circumference of an ellipse.
Hexagon Area Calculator
Find the area and perimeter of a regular hexagon.
Pentagon Area Calculator
Find the area and perimeter of a regular pentagon.
Regular Polygon Area Calculator
Find the area, perimeter and angles of any regular polygon.
Pyramid Volume Calculator
Find the volume of a rectangular-base pyramid.
Rectangular Prism Volume Calculator
Find the volume, surface area and diagonal of a box.
Nth Root Calculator
Find any root of a number — square, cube or nth.
Antilog Calculator
Find the antilogarithm of a number for any base.
Cross Product Calculator
Find the cross product of two 3D vectors.
Box Surface Area Calculator
Find the total and lateral surface area of a box.
Sector Area Calculator
Find the area and arc length of a circular sector.
Arc Length Calculator
Find the arc length and chord of a circular arc.
Parallelogram Area Calculator
Find the area and perimeter of a parallelogram.
Binary to Decimal Calculator
Convert a binary number to decimal.
Hex to Decimal Calculator
Convert a hexadecimal number to decimal.
Roman Numeral Converter
Convert a number to Roman numerals.
Number to Words Converter
Spell out a number in English words.
Octal to Decimal Calculator
Convert an octal number to decimal.
Decimal to Binary Calculator
Convert a decimal number to binary.
Decimal to Hex Calculator
Convert a decimal number to hexadecimal.
Decimal to Octal Calculator
Convert a decimal number to octal.
3D Distance Calculator
Find the distance between two points in 3D space.
Range Calculator
Find the range, minimum and maximum of data.
Midrange Calculator
Find the midrange, the midpoint of the extremes.
Triangle Perimeter Calculator
Find the perimeter of a triangle from its sides.
Sphere Surface Area Calculator
Find the surface area and volume of a sphere.
Cone Surface Area Calculator
Find the surface area of a cone.
Cylinder Surface Area Calculator
Find the surface area of a cylinder.
Binomial Coefficient Calculator
Compute n choose k, the number of combinations.
Fibonacci Sequence Calculator
Find the nth Fibonacci number and the sum to n.
Discriminant Calculator
Find the discriminant of a quadratic and its roots.
Slope-Intercept Form Calculator
Find the line equation through two points.
Heron's Formula Calculator
Find a triangle's area from its three sides.
Ellipse Perimeter Calculator
Estimate an ellipse's perimeter and area.
Rhombus Area Calculator
Find a rhombus's area from its diagonals.
Frustum Volume Calculator
Find the volume of a conical frustum.
Torus Volume Calculator
Find the volume and surface area of a torus.
Tetrahedron Volume Calculator
Find the volume of a regular tetrahedron.
Spherical Cap Calculator
Find the volume and surface of a spherical cap.
Polar to Cartesian Calculator
Convert polar coordinates to x, y coordinates.
Cartesian to Polar Calculator
Convert x, y coordinates to polar coordinates.
2x2 Determinant Calculator
Find the determinant of a 2x2 matrix.
Triangular Number Calculator
Find the nth triangular number.
Catalan Number Calculator
Find the nth Catalan number.
Modular Exponentiation Calculator
Compute (base^exponent) mod m efficiently.
Perfect Number Calculator
Check if a number is perfect, deficient or abundant.
Digit Sum Calculator
Find the sum of digits and the digital root.
Correlation Coefficient Calculator
Find the Pearson correlation between two datasets.
Chi-Square Statistic Calculator
Compute the chi-square statistic from observed and expected.
Combinations with Repetition Calculator
Count multiset combinations allowing repeats.
Ratio Simplifier Calculator
Simplify a ratio to its lowest terms.
Finance
Mortgage Calculator
Estimate your monthly mortgage payment.
Compound Interest Calculator
See how savings grow with compound interest.
ROI Calculator
Measure return on investment as a percentage.
Loan Calculator
Estimate monthly payments on any loan.
Simple Interest Calculator
Calculate simple interest on a principal.
Investment Calculator
Project the growth of an investment.
Savings Calculator
See how regular saving adds up over time.
Profit Margin Calculator
Find profit, margin and markup from revenue and cost.
Markup Calculator
Set a selling price from cost and markup.
Break-even Calculator
Find the units you must sell to break even.
Auto Loan Calculator
Calculate your monthly car payment and total loan cost.
Retirement Calculator
Project your retirement savings and monthly income.
Debt Payoff Calculator
Find out when you'll be debt-free and how much interest you'll pay.
Inflation Calculator
Find the equivalent value of money across any time period.
APR Calculator
Calculate the true annual cost of a loan including all fees.
Home Affordability Calculator
Find out how much house you can afford based on income and debts.
Net Worth Calculator
Calculate your net worth by totaling assets minus liabilities.
Tax Bracket Calculator
See your federal income tax by bracket and effective tax rate.
Emergency Fund Calculator
Calculate how much emergency savings you need.
Budget Calculator
Create a monthly budget using the 50/30/20 rule.
Salary Calculator
Convert annual salary to hourly, monthly, or biweekly pay.
Rental Yield Calculator
Calculate gross and net rental yield on an investment property.
Dividend Calculator
Calculate dividend income and projected growth over time.
Currency Converter
Convert between major world currencies using standard exchange rates.
Stock Return Calculator
Calculate total return and annualized return on a stock investment.
College Cost Calculator
Estimate total college cost and savings needed for your child's education.
Car Depreciation Calculator
Calculate how much your vehicle loses in value over time.
Leasing vs Buying Calculator
Compare the total cost of leasing versus buying a vehicle.
Hourly Wage Calculator
Convert hourly wage to annual, monthly, weekly, and biweekly pay.
Paycheck Calculator
Estimate your take-home pay after federal taxes and deductions.
Roth IRA Calculator
Project the tax-free growth of a Roth IRA.
401(k) Calculator
Project a 401(k) balance with employer match.
Credit Card Payoff Calculator
See how long it takes to clear a card balance.
Car Affordability Calculator
Find the car price your budget supports.
CD Interest Calculator
Find the maturity value of a certificate of deposit.
Mortgage Points Calculator
See what discount points cost and when they break even.
Debt-to-Income Ratio Calculator
See what share of your income goes to debt.
Rule of 72 Calculator
Estimate how long it takes an investment to double.
Savings Goal Calculator
Find how long it takes to reach a savings target.
Future Value Calculator
Project what a lump sum grows to over time.
Present Value Calculator
Find what a future sum is worth today.
Annuity Payment Calculator
Find the fixed payment that pays off a principal.
Salary Raise Calculator
See your new salary after a percentage raise.
FICA Tax Calculator
Estimate Social Security and Medicare withholding.
Capital Gains Tax Calculator
Estimate tax owed on an investment sale.
Student Loan Calculator
Estimate monthly payments on a student loan.
Simple vs Compound Interest Calculator
Compare simple and compound interest side by side.
Loan Affordability Calculator
Find the loan a monthly payment can support.
Effective Annual Rate Calculator
Convert a nominal rate into its true annual yield.
Sinking Fund Calculator
Find the monthly deposit to reach a savings goal.
Debt Snowball Calculator
See how long a fixed payment takes to clear a debt.
Dividend Yield Calculator
Find a stock's dividend yield from price and payout.
P/E Ratio Calculator
Find a stock's price-to-earnings ratio.
Bond Current Yield Calculator
Find a bond's current yield from coupon and price.
Stock Break-Even Calculator
Find the price a stock must reach to break even.
Retirement Nest Egg Calculator
Find the savings target your retirement needs.
NPV Calculator
Find the net present value of a series of cash flows.
IRR Calculator
Find the internal rate of return of a cash flow stream.
WACC Calculator
Find the weighted average cost of capital.
Return on Equity Calculator
Find return on equity from net income and equity.
EPS Calculator
Find earnings per share from net income and shares.
Balloon Payment Calculator
Find the monthly payment and final balloon on a loan.
Credit Utilization Calculator
Find your credit utilization ratio across cards.
Perpetuity Calculator
Find the present value of a perpetual cash flow.
Asset Turnover Calculator
Find how efficiently assets generate revenue.
Price-to-Book Ratio Calculator
Find the P/B ratio from price and book value.
Market Cap Calculator
Find a company's market capitalization.
Enterprise Value Calculator
Find enterprise value from market cap, debt and cash.
CAPM Calculator
Find the expected return using the CAPM model.
GST Calculator
Add or remove GST/VAT from a price.
APY Calculator
Find annual percentage yield from a nominal rate.
APY to APR Calculator
Convert an APY back to a nominal APR.
CD Ladder Calculator
Plan a certificate of deposit ladder strategy.
Overtime Pay Calculator
Find your overtime and total pay for a period.
Effective Tax Rate Calculator
Find the real percentage of income you pay in tax.
Salary to Hourly Calculator
Convert an annual salary to an hourly wage.
Rent-to-Income Ratio Calculator
Find what share of income your rent takes.
50/30/20 Budget Calculator
Split your income into needs, wants and savings.
Net Present Value (NPV) Calculator
Find the NPV of an investment's cash flows.
Reverse Sales Tax Calculator
Find the pre-tax price and tax from a total.
Stock Profit Calculator
Find profit and return on a stock trade.
Dividend Reinvestment Calculator
Estimate DRIP growth from reinvested dividends.
Dollar-Cost Averaging Calculator
Project the value of regular fixed investments.
Stock Average Down Calculator
Find your new average cost after buying more.
Margin Trading Calculator
Find buying power and borrowed funds with leverage.
Pip Value Calculator
Find the value of a pip for a forex position.
Forex Position Size Calculator
Size a forex trade based on your risk.
Sharpe Ratio Calculator
Measure risk-adjusted return of an investment.
Bond Price Calculator
Find a bond's price from its yield and coupon.
Annuity Payout Calculator
Find the regular payment a lump sum provides.
Retirement Withdrawal Calculator
Find safe withdrawal amounts from a nest egg.
Doubling Time Calculator
Find how long an investment takes to double.
Real Rate of Return Calculator
Find your return after adjusting for inflation.
Staking Rewards Calculator
Estimate crypto staking rewards with compounding.
Biweekly Mortgage Calculator
See interest and time saved with biweekly payments.
Interest-Only Mortgage Calculator
Find the monthly payment on an interest-only loan.
Refinance Savings Calculator
Find monthly savings and break-even on a refinance.
Loan-to-Cost (LTC) Calculator
Find the loan-to-cost ratio for a project.
PITI Calculator
Find your full monthly mortgage payment with PITI.
Loan Payoff Calculator
Find how long to pay off a loan at a fixed payment.
Loan Comparison Calculator
Compare two loan options side by side.
Savings Withdrawal Calculator
Find how long savings last with regular withdrawals.
CD Calculator
Find the maturity value of a certificate of deposit.
FIRE Number Calculator
Find the portfolio you need for financial independence.
Coast FIRE Calculator
Find the savings that will coast to retirement.
Emergency Fund Months Calculator
Find how many months your emergency fund covers.
Crypto Profit Calculator
Find profit and return on a crypto trade.
Extra Payment Calculator
See interest and time saved by paying extra.
401(k) Match Calculator
Find your employer 401(k) match and total contribution.
Real Estate Commission Calculator
Find the commission on a home sale and seller net.
Yield to Maturity Calculator
Estimate a bond's yield to maturity and current yield.
Cost of Living Adjustment (COLA) Calculator
Find your new salary after a COLA increase.
Required Minimum Distribution (RMD) Calculator
Find your RMD from a retirement account by age.
Nominal to Real Rate Calculator
Find the real interest rate after inflation.
Life Insurance Calculator
Estimate how much life insurance coverage you need.
Disability Insurance Calculator
Estimate the monthly disability benefit you need.
HSA Contribution Calculator
Find your HSA contribution room and tax savings.
FSA Calculator
Find your FSA tax savings and per-paycheck cost.
Self-Employment Tax Calculator
Estimate self-employment tax on your net profit.
Estate Tax Calculator
Estimate estate tax above the exemption.
Take-Home Pay Calculator
Estimate your net pay after taxes and deductions.
Net to Gross Calculator
Find the gross pay needed for a target net.
Vacation Accrual Calculator
Track PTO earned from hours worked.
Treasury Bill Calculator
Find T-bill discount and investment yields.
529 College Savings Calculator
Project the future value of a 529 plan.
Quarterly Tax Calculator
Estimate quarterly estimated tax payments.
Gift Tax Calculator
See how much of a gift exceeds the exclusion.
Pension Calculator
Estimate a defined-benefit pension payout.
Total Cost of Ownership Calculator
Find the true cost of owning something over time.
Bulk Discount Calculator
Compare bulk unit price against regular price.
Side Hustle Income Calculator
Project income from a side hustle.
Annual vs Monthly Calculator
Compare paying annually versus monthly.
Health
BMI Calculator
Calculate your Body Mass Index and category.
BMR Calculator
Estimate your daily calories burned at rest.
TDEE Calculator
Estimate your total daily energy expenditure.
Calorie Calculator
Find daily calories for your goal.
Body Fat Calculator
Estimate body fat with the U.S. Navy method.
Ideal Weight Calculator
Estimate a healthy target weight for your height.
Protein Calculator
Find your daily protein target.
Macro Calculator
Split daily calories into protein, carbs and fat.
Water Intake Calculator
Estimate how much water to drink daily.
Running Pace Calculator
Find your pace per km and per mile.
Heart Rate Zone Calculator
Find your maximum heart rate and training zones using the Karvonen method.
Calories Burned Calculator
Estimate calories burned during exercise using MET values and body weight.
Body Surface Area Calculator
Estimate body surface area from height and weight.
Waist-to-Height Ratio Calculator
Assess central fat risk from waist and height.
Sleep Debt Calculator
Track accumulated sleep lost against your target.
Blood Alcohol Content Calculator
Estimate your BAC from drinks, weight and time.
Max Heart Rate Calculator
Estimate maximum heart rate and training zones.
Lean Body Mass Calculator
Estimate lean mass and fat mass from height and weight.
Army Body Fat Calculator
Estimate body fat using the tape measurement method.
Target Heart Rate Calculator
Find your training heart rate from age and intensity.
Calorie Deficit Calculator
Find the daily deficit needed to reach a weight goal.
Daily Water Intake Calculator
Estimate how much water to drink each day.
Ponderal Index Calculator
Assess body leanness using weight and height cubed.
Alcohol Units Calculator
Count units and grams of alcohol in a drink.
Sleep Cycle Calculator
Find the best bedtime to wake between sleep cycles.
Macros by Goal Calculator
Split a calorie target into protein, carbs and fat.
BMI Prime Calculator
See your BMI as a ratio of the upper healthy limit.
Calories Burned by Activity Calculator
Estimate calories burned from an activity's MET value, your weight and time.
Body Frame Size Calculator
Determine small, medium or large frame from height and wrist size.
Pregnancy Weight Gain Calculator
Find the recommended weight-gain range for pregnancy from pre-pregnancy BMI.
Weight Loss Calorie Goal Calculator
Find the daily calorie target for a chosen weekly weight-loss rate.
Heart Rate Zones Calculator
Calculate your max heart rate and training zone boundaries from age.
Daily Protein Intake Calculator
Estimate daily protein needs from body weight and activity level.
Exercise Hydration Calculator
Estimate the fluid to replace during exercise from duration and sweat rate.
Steps to Calories Calculator
Convert a daily step count into an estimate of calories burned.
Blood Pressure Category Calculator
Classify a blood pressure reading using AHA categories.
Waist-to-Hip Ratio Calculator
Assess fat-distribution health risk from waist and hip measurements.
A1C to Glucose Calculator
Convert A1C to estimated average glucose and back.
Creatinine Clearance Calculator
Estimate kidney function with the Cockcroft-Gault formula.
Pregnancy Due Date Calculator
Estimate your due date from your last period.
Ovulation Calculator
Estimate your ovulation day and fertile window.
Gestational Age Calculator
Find how many weeks pregnant you are.
MET Calories Calculator
Find calories burned from an activity's MET value.
Protein Intake Calculator
Find your daily protein target from body weight.
Fat Intake Calculator
Find your daily fat target in grams from calories.
Mean Arterial Pressure Calculator
Estimate mean arterial pressure from blood pressure.
Pack-Years Calculator
Find smoking pack-years from packs and years.
TDEE to Calorie Goal Calculator
Set a daily calorie target from your TDEE.
Total Body Water Calculator
Estimate the total water in your body.
Sodium Intake Calculator
Compare your sodium intake to the daily limit.
Fiber Intake Calculator
Find your recommended daily fiber from your calories.
Sugar Intake Calculator
Compare your added sugar to the daily limit.
Sweat Rate Calculator
Find how much fluid you lose per hour of exercise.
Fat-Free Mass Index (FFMI) Calculator
Find your FFMI from weight, height and body fat.
Cholesterol Ratio Calculator
Find your total-to-HDL cholesterol ratio.
LDL Cholesterol Calculator
Estimate LDL cholesterol with the Friedewald equation.
Karvonen Heart Rate Calculator
Find your target heart rate using heart-rate reserve.
METs Calories Calculator
Find calories burned from an activity's MET value.
Caffeine Half-Life Calculator
Find how much caffeine remains after a set time.
Standard Drink Calculator
Convert a drink's size and ABV into standard drinks.
Glycemic Load Calculator
Find a food's glycemic load from GI and carbs.
Net Carbs Calculator
Find net carbs from total carbs, fiber and sugar alcohols.
Exercise Water Intake Calculator
Find your daily water needs including exercise.
Child Height Prediction Calculator
Predict adult height from parents' heights.
Date & Time
Age Calculator
Find an exact age in years, months and days.
Date Difference Calculator
Count the time between two dates.
Business Days Calculator
Count working days between two dates.
Time Duration Calculator
Find the duration between two times.
Overtime Calculator
Calculate pay with overtime hours.
Countdown Calculator
Calculate exactly how long until any future date in years, months, weeks, days, hours, and minutes.
Add Days Calculator
Add or subtract days from a date.
Week Number Calculator
Find the ISO week number of a date.
Day of the Week Calculator
Find what day of the week a date falls on.
Leap Year Calculator
Check if a year is a leap year.
Time Card Calculator
Work out hours worked from a shift.
Decimal Hours to Time Calculator
Convert decimal hours to hours and minutes.
Unix Timestamp Converter
Convert a Unix timestamp to a UTC date.
Annual Work Hours Calculator
Estimate total work hours in a year.
Age on Date Calculator
Find someone's age on a specific date.
Add Time Calculator
Add hours and minutes to a time.
Days 360 Calculator
Count days between dates on the 30/360 basis.
Weeks Between Dates Calculator
Count the weeks and days between two dates.
Months Between Dates Calculator
Count full months and days between two dates.
Fiscal Quarter Calculator
Find which quarter a date falls in.
Time Addition Calculator
Add two durations in hours and minutes.
Time to Decimal Calculator
Convert hours and minutes to decimal hours.
Workday End Time Calculator
Find when a shift ends from start, length and break.
Add Business Days Calculator
Add working days to a date, skipping weekends.
Sleep Duration Calculator
Find how long you slept from bedtime to wake time.
Hours Between Times Calculator
Find the hours between two clock times.
Project Deadline Calculator
Find a deadline from effort hours and working days.
Time Zone Difference Calculator
Convert a time between two UTC offsets.
Work Hours Calculator
Find hours worked between two times minus breaks.
Days Until Calculator
Count the days between a date and an event.
Converters
Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin.
Length Converter
Convert between metric and imperial length units.
Weight Converter
Convert between kg, lb, oz and more.
Speed Converter
Convert between mph, km/h, m/s and knots.
Data Storage Converter
Convert between bytes, KB, MB, GB and TB.
Area Converter
Convert area between square meters, square feet, acres, hectares, and more.
Volume Converter
Convert volume between liters, gallons, cups, fluid ounces, cubic meters, and more.
Pressure Converter
Convert pressure between pascals, psi, bar, atmospheres, mmHg, and more.
Energy Converter
Convert energy between joules, calories, kilowatt-hours, BTU, and more.
Cooking Measurement Converter
Convert between cups, tablespoons, teaspoons, milliliters, and other cooking measurements.
Power Converter
Convert between watts, kilowatts, horsepower and BTU/h.
Torque Converter
Convert between N·m, lbf·ft, lbf·in and kgf·m.
Angle Converter
Convert between degrees, radians, gradians and more.
Frequency Converter
Convert between Hz, kHz, MHz, GHz and rpm.
Fuel Economy Converter
Convert between MPG (US/UK), km/L and L/100km.
Force Converter
Convert between newtons, kilonewtons, kgf, lbf and dynes.
Time Unit Converter
Convert between seconds, minutes, hours, days and years.
Data Transfer Rate Converter
Convert between bit/s, Mbit/s, MB/s and more.
Cooking Volume Converter
Convert between cups, tablespoons, ml, litres and more.
Pace & Speed Converter
Convert between running pace and speed — min/km, min/mi, km/h, mph.
Acceleration Converter
Convert between m/s², ft/s², g and gal.
Density Converter
Convert between kg/m³, g/cm³, lb/ft³ and more.
Flow Rate Converter
Convert between L/s, L/min, m³/h, gal/min and ft³/s.
Illuminance Converter
Convert between lux, foot-candles and phot.
Magnetic Field Converter
Convert between tesla, millitesla, microtesla and gauss.
Radiation Dose Converter
Convert between sievert, mSv, µSv and rem.
Cooking Weight Converter
Convert between grams, kilograms, ounces and pounds.
Typography Unit Converter
Convert between points, pixels, picas, inches and mm.
Blood Sugar Converter
Convert blood glucose between mg/dL and mmol/L.
Shoe Size Converter
Convert men's shoe sizes between US, UK and EU (approximate).
PSI to Bar Calculator
Convert pressure from PSI to bar, kPa and atm.
Knots to MPH Calculator
Convert speed from knots to mph, km/h and m/s.
Lumens to Watts Calculator
Convert light output to power using efficacy.
Decibel Distance Calculator
Find how sound level drops with distance.
Nautical Miles to Miles Calculator
Convert nautical miles to statute miles and km.
Business
Freelance Rate Calculator
Work out the hourly rate you need to charge.
Revenue Calculator
Calculate revenue and gross profit from sales.
Cash Flow Calculator
Track net cash flow and ending balance.
Employee Cost Calculator
Calculate the true total cost of an employee including salary, benefits, taxes, and overhead.
Gross Profit Calculator
Find gross profit and gross margin from revenue and COGS.
Operating Margin Calculator
Measure operating profitability as a share of revenue.
EBITDA Calculator
Add back interest, tax, depreciation and amortization to net income.
Payback Period Calculator
Find how long an investment takes to repay its initial cost.
Inventory Turnover Calculator
Measure how many times stock sells and how long it sits.
CAGR Calculator
Find the compound annual growth rate between two values.
Net Profit Margin Calculator
Find the share of revenue left as net profit.
Contribution Margin Calculator
Find the profit each unit contributes after variable costs.
Working Capital Calculator
Find working capital and the current ratio from your balance sheet.
Burn Rate Calculator
Find monthly cash burn and how many months of runway remain.
Markup to Margin Calculator
Convert a markup percentage into the equivalent profit margin.
Chained Discount Calculator
Apply two successive discounts and find the true effective rate.
Sales Commission Calculator
Find the commission earned on a sale from the rate and amount.
Target Margin Price Calculator
Set a selling price from unit cost and a desired profit margin.
Employee Turnover Rate Calculator
Find the percentage of staff who leave over a period.
Revenue Per Employee Calculator
Measure how much revenue each employee generates on average.
Operating Cash Flow Calculator
Find cash from operations using the indirect method.
Quick Ratio Calculator
Measure short-term liquidity excluding inventory.
Debt-to-Equity Ratio Calculator
Compare total debt against equity to gauge financial leverage.
Return on Assets Calculator
Measure how efficiently assets generate net income.
LTV:CAC Ratio Calculator
Compare customer lifetime value to acquisition cost.
ARPU Calculator
Find average revenue per user from revenue and users.
ARR Calculator
Convert monthly recurring revenue to annual (ARR).
Economic Order Quantity Calculator
Find the optimal order size that minimizes cost (EOQ).
GMROI Calculator
Find gross margin return on inventory investment.
Price Elasticity of Demand Calculator
Find how demand responds to a price change.
Net Revenue Retention Calculator
Find your net revenue retention (NRR) rate.
Cash Runway Calculator
Find how many months of cash your business has left.
Days Payable Outstanding (DPO) Calculator
Find the average days you take to pay suppliers.
Days Sales Outstanding (DSO) Calculator
Find the average days to collect receivables.
Current Ratio Calculator
Measure short-term liquidity from assets and liabilities.
Accounts Receivable Turnover Calculator
Find how often you collect receivables per year.
Gross Margin Calculator
Find gross margin and gross profit.
Sales Forecast Calculator
Project future sales with a growth rate.
Profit Per Employee Calculator
Measure profit generated per employee.
Operating Expense Ratio Calculator
Find operating expenses as a share of revenue.
Construction
Paint Calculator
Estimate how much paint your project needs.
Concrete Calculator
Estimate concrete volume and bags needed.
Tile Calculator
Estimate how many tiles you need.
Gravel Calculator
Estimate cubic yards and tons of gravel needed.
Mulch Calculator
Estimate cubic yards and bags of mulch needed.
Rebar Calculator
Estimate rebar bars and total length for a slab grid.
Drywall Calculator
Estimate drywall sheets and screws for a wall area.
Roofing Calculator
Estimate roofing squares and shingle bundles needed.
Insulation Calculator
Estimate how many bags or batts of insulation you need.
Deck Board Calculator
Estimate deck boards and lineal feet for a deck.
Fence Calculator
Estimate fence posts, sections and pickets needed.
Flooring Calculator
Estimate flooring boxes and square footage needed.
Brick Calculator
Estimate how many bricks you need for a wall.
Stair Calculator
Work out steps, riser height and total run for a staircase.
Wallpaper Calculator
Estimate how many rolls of wallpaper a wall needs.
Paver Calculator
Estimate how many pavers you need for a patio or path.
Topsoil Calculator
Estimate cubic yards of topsoil needed for a bed or lawn.
Sod Calculator
Estimate rolls and pallets of sod needed for a lawn.
Board Foot Calculator
Calculate board feet of lumber from its dimensions.
Wall Stud Calculator
Estimate how many studs a wall needs at a given spacing.
Excavation Calculator
Estimate cubic yards of soil to excavate and haul away.
Asphalt Calculator
Estimate tons of asphalt for a driveway or lot.
Plywood Sheet Calculator
Estimate how many sheets of plywood cover an area.
Beam Load Calculator
Find bending moment, shear and reactions on a beam.
Door Frame Calculator
Find rough opening size and casing length for a door.
Roof Pitch Calculator
Find roof pitch, angle and slope factor from rise and run.
Concrete Block Calculator
Find how many concrete blocks a wall needs.
Wall Framing Calculator
Find studs and plate length for a framed wall.
Retaining Wall Block Calculator
Find blocks and courses for a retaining wall.
Baseboard Calculator
Find linear feet of baseboard for a room.
Crown Molding Calculator
Find linear feet of crown molding for a room.
Stucco Calculator
Find how many bags of stucco a wall needs.
Snow Load Calculator
Estimate the snow load on a roof.
Grass Seed Calculator
Find how much grass seed your lawn needs.
Carpet Cost Calculator
Estimate carpet cost including a waste allowance.
Rafter Length Calculator
Find rafter length from run and roof pitch.
Drywall Sheets Calculator
Find how many drywall sheets you need.
Gravel Driveway Calculator
Find the gravel volume and tons for a driveway.
Grout Calculator
Estimate the grout needed to tile an area.
Raised Bed Soil Calculator
Find how much soil fills a raised garden bed.
Pond Liner Calculator
Find the liner size needed for a garden pond.
Driveway Sealer Calculator
Estimate sealer needed for an asphalt driveway.
Deck Stain Calculator
Estimate how much stain your deck needs.
Gutter Size Calculator
Size gutters and downspouts for your roof.
Education
Grade Calculator
Work out your final weighted grade.
GPA Calculator
Calculate your grade point average.
Final Grade Calculator
Find the score you need on your final exam.
Weighted Grade Calculator
Average scores that carry different weights.
Test Score Calculator
Turn points earned into a percentage and letter grade.
GPA to Percentage Calculator
Convert a 4.0-scale GPA into a percentage.
Cumulative GPA Calculator
Combine your prior GPA with a new semester.
Reading Time Calculator
Estimate how long a text takes to read.
Study Time Calculator
Plan weekly study hours from your course load.
Words Per Page Calculator
Estimate total words from a page count.
Grade Curve Calculator
Apply a linear curve to a test score.
Attendance Calculator
Work out your attendance percentage.
Class Rank Calculator
Find your class rank percentile and top percentage.
Reading Speed Calculator
Measure your reading speed in words per minute.
Words Per Minute (Speech) Calculator
Estimate how long a speech or script will take.
Semester GPA Calculator
Find your semester GPA from grades and credits.
Final Exam Grade Needed Calculator
Find the exam score you need for a target grade.
Class Attendance Calculator
Find your attendance percentage from classes.
Test Grade Calculator
Find your test percentage and letter grade.
Credits to Graduate Calculator
Find credits and semesters left until graduation.
Cumulative GPA Target Calculator
Find the GPA you need to hit a target cumulative GPA.
Percentage to GPA Calculator
Convert a percentage grade to a 4.0-scale GPA.
Tuition Cost Calculator
Estimate total tuition from credits and fees.
Scholarship Calculator
Find your net college cost after aid.
Learning Retention Calculator
Estimate memory retention over time.
Rubric Score Calculator
Total points across rubric criteria into a grade.
Reading Level Calculator
Find the Flesch reading ease of a text.
Degree Progress Calculator
Track credits completed toward your degree.
E-commerce
E-commerce Profit Calculator
See your true profit and margin per sale.
Average Order Value Calculator
Find your average revenue per order.
Ecommerce Conversion Rate Calculator
Turn orders and visitors into a conversion rate.
Cart Abandonment Rate Calculator
See how many shoppers leave without buying.
Product Profit Calculator
Net profit and margin after every cost.
Days of Inventory Calculator
How long your current stock will last.
Reorder Point Calculator
Know exactly when to reorder stock.
Sell-Through Rate Calculator
What share of received stock has sold.
GMV Calculator
Gross merchandise value from orders and AOV.
Customer Retention Rate Calculator
The share of customers you keep.
Ecommerce Shipping Cost Calculator
Average shipping cost per order.
Dropshipping Profit Calculator
Find profit per order for a dropshipping product.
Amazon FBA Profit Calculator
Find profit per unit after Amazon FBA fees.
Stripe Fee Calculator
Find the Stripe fee and net amount on a payment.
PayPal Fee Calculator
Find the PayPal fee and net amount on a payment.
Etsy Fee Calculator
Find total Etsy fees and your net payout.
eBay Fee Calculator
Find eBay final value fees and your net payout.
Everyday Life
Tip Calculator
Calculate the tip amount and total bill for any service. Split among multiple people too.
Split Bill Calculator
Evenly split a restaurant bill or any shared expense among any number of people, including tip.
Discount Calculator
Calculate the sale price after a percentage or fixed discount. See your savings instantly.
Sales Tax Calculator
Calculate the sales tax amount and total price including tax for any purchase.
Unit Price Calculator
Compare the cost per unit of two products to find the better deal.
Electricity Bill Calculator
Estimate what an appliance costs to run per month and year from its wattage, usage hours, and your energy rate.
Subscription Cost Calculator
See what your monthly subscriptions truly cost per year, over several years, and per day.
Commute Cost Calculator
Estimate the fuel cost of your daily commute per day, week, and year from distance, fuel economy, and gas price.
Coffee Cost Calculator
See what your daily coffee habit costs per month, per year, and over a decade.
Wedding Budget Calculator
Estimate your total wedding budget from guest count, per-guest cost, venue, and extras — plus the cost per guest.
Gift Budget Calculator
Work out your total gift budget from the number of people and how much you plan to spend on each.
Gas Trip Cost Calculator
Estimate the fuel cost of any drive from the distance, your vehicle's MPG, and the current gas price.
Cost Per Use Calculator
See the true value of a purchase by dividing what it cost by how many times you actually use it.
Price Per Unit Comparison Calculator
Compare two products by unit price to see which is genuinely the better deal, regardless of package size.
Tip & Split Calculator
Add a tip to a bill and split the total evenly across your group to find exactly what each person owes.
Savings Rate Calculator
Find what share of your income you save each month — the single number that most shapes your financial progress.
Hourly to Salary Calculator
Convert an hourly wage into annual and monthly salary from your hours per week and weeks worked per year.
Grocery Budget Calculator
Estimate your weekly and monthly grocery budget from household size and a per-person weekly spend.
Screen Time Calculator
See how your daily screen time adds up across a week, a year, and in full 24-hour days of your life.
Water Usage Cost Calculator
Estimate the daily and monthly cost of your water use from gallons per day and your price per thousand gallons.
Pet Food Cost Calculator
Work out how long a bag of pet food lasts and what feeding your pet costs each month.
Typing Speed (WPM) Calculator
Find your typing speed in words per minute.
Dog Age Calculator
Convert your dog's age into human years.
Pool Volume Calculator
Find your swimming pool's volume in gallons.
Cost Per Serving Calculator
Find the cost of one serving of a recipe or dish.
Propane Tank Runtime Calculator
Estimate how long a propane tank will last.
Generator Runtime Calculator
Estimate how long a generator runs on a tank.
Lawn Seed Calculator
Find how much grass seed your lawn needs.
Appliance Energy Cost Calculator
Find what an appliance costs to run per year.
Phone Plan Comparison Calculator
Compare the total cost of two phone plans.
Ice for Party Calculator
Find how much ice you need for a party.
Firewood Cord Calculator
Find how many cords a wood stack contains.
Aquarium Volume Calculator
Find a fish tank's volume in gallons and liters.
Cat Age Calculator
Convert your cat's age to human years.
Chicken Feed Calculator
Estimate feed usage and cost for your flock.
Hot Tub Heating Cost Calculator
Estimate the cost to heat a hot tub's water.
Pool Chlorine Calculator
Find the chlorine dose to reach a target level.
Ice Melt Calculator
Find how much ice melt or rock salt you need.
Flight Time Calculator
Estimate flight time from distance and speed.
Per Diem Calculator
Total travel per diem for lodging and meals.
Trip Budget Calculator
Estimate the total cost of a trip.
Jet Lag Recovery Calculator
Estimate days to recover from jet lag.
Hotel Cost Calculator
Total hotel cost with rooms and tax.
Baggage Weight Calculator
Check luggage against airline weight limits.
Time Zone Difference Calculator
Find the hour difference between two time zones.
Drive Time Calculator
Estimate road trip time including rest breaks.
Rent Split Calculator
Split rent and utilities among roommates.
Gas Money Split Calculator
Split trip fuel cost among passengers.
Cost of Smoking Calculator
See how much smoking costs over time.
Party Cost Calculator
Estimate the total cost of hosting a party.
Habit Cost Calculator
See the yearly cost of a daily habit.
Generation Calculator
Find which generation a birth year belongs to.
Zodiac Sign Calculator
Find your Western zodiac sign by birth date.
Chinese Zodiac Calculator
Find your Chinese zodiac animal by year.
Kids Allowance Calculator
Estimate an age-based kids' allowance.
Dog Food Calculator
Find how much to feed your dog per day.
Cat Food Calculator
Find how much to feed your cat per day.
Fish Stocking Calculator
Estimate how many fish fit in an aquarium.
Tattoo Cost Calculator
Estimate the cost of a tattoo.
Hair Growth Calculator
Estimate how long hair takes to grow.
Paint Mixing Ratio Calculator
Mix paint and additive by a set ratio.
Ring Size Calculator
Convert finger circumference to US ring size.
Tip Jar Split Calculator
Split pooled tips by hours worked.
Litter Box Calculator
Find how many litter boxes and litter you need.
Marketing
ROAS Calculator
Measure return on ad spend from revenue.
CPM Calculator
Find cost per thousand impressions from spend and reach.
CPC Calculator
Work out cost per click from spend and clicks.
CTR Calculator
Calculate click-through rate from clicks and impressions.
Conversion Rate Calculator
Find the percentage of visitors who convert.
Cost Per Acquisition Calculator
Calculate what each acquisition costs from total spend.
Customer Lifetime Value Calculator
Estimate the total revenue a customer brings over time.
Customer Acquisition Cost Calculator
Find what it costs to win each new customer.
Churn Rate Calculator
Measure the percentage of customers you lose.
MRR Calculator
Calculate monthly recurring revenue and annual run rate.
Email Marketing ROI Calculator
Measure return and profit from an email campaign.
Cost Per Lead Calculator
Find your cost per lead from ad spend and leads.
Engagement Rate Calculator
Find your social media engagement rate.
Cost Per Conversion Calculator
Find how much you pay per conversion.
Lead Conversion Rate Calculator
Find the rate at which leads become customers.
Viral Coefficient Calculator
Find your viral coefficient (k-factor) for growth.
Share of Voice Calculator
Find your brand's share of voice in the market.
NPS Calculator
Find your Net Promoter Score from survey responses.
Email Open Rate Calculator
Find your email open rate from opens and delivered.
Email Bounce Rate Calculator
Find your email bounce rate and delivery rate.
Repeat Purchase Rate Calculator
Find the share of customers who buy again.
Science
Ohm's Law Calculator
Solve voltage, current, resistance and power.
Density Calculator
Find density from mass and volume.
Force Calculator
Calculate force from mass and acceleration.
Kinetic Energy Calculator
Compute kinetic energy and momentum.
pH Calculator
Find pH and pOH from hydrogen ion concentration.
Speed Distance Time Calculator
Solve for speed, distance or time.
Wavelength Calculator
Find wavelength and period from wave speed and frequency.
Electric Power Calculator
Find electrical power and resistance from voltage and current.
Gravitational Force Calculator
Find the gravitational attraction between two masses.
Thermal Expansion Calculator
Find how much a material expands when heated.
Pressure Volume Calculator
Find a gas's new volume using Boyle's law.
Molarity Calculator
Find solution concentration from moles and volume.
Half-Life Calculator
Find the amount remaining after radioactive decay.
Potential Energy Calculator
Gravitational potential energy from mass and height.
Momentum Calculator
Calculate linear momentum from mass and velocity.
Acceleration Calculator
Find acceleration from change in velocity over time.
Ideal Gas Law Calculator
Find moles of gas from pressure, volume, temperature.
Projectile Motion Calculator
Range, height, and flight time of a projectile.
Specific Heat Calculator
Heat energy from mass, specific heat, temperature change.
Coulomb's Law Calculator
Electrostatic force between two point charges.
Mass-Energy Equivalence Calculator
Convert mass to energy with E = mc².
Work Done Calculator
Calculate mechanical work from force and distance.
Efficiency Calculator
Find energy efficiency as a percentage.
Hydrostatic Pressure Calculator
Find fluid pressure at a given depth.
Heat Index Calculator
Find the 'feels like' temperature from heat and humidity.
Wind Chill Calculator
Find the 'feels like' temperature in cold, windy weather.
Dew Point Calculator
Find the dew point from temperature and humidity.
Terminal Velocity Calculator
Find the maximum falling speed through a fluid.
Escape Velocity Calculator
Find the speed needed to escape a planet's gravity.
Thin Lens Calculator
Find focal length from object and image distance.
Doppler Effect Calculator
Find the observed frequency from a moving source.
Capacitance Calculator
Find capacitance and stored energy from charge and voltage.
Radioactive Decay Calculator
Find how much of a sample remains after a time.
Dilution Calculator
Find the final volume for a target concentration.
pKa Calculator
Convert between Ka and pKa for acids.
Charles's Law Calculator
Find a gas's new volume when temperature changes.
Combined Gas Law Calculator
Find a gas's new volume from changing P and T.
Buoyancy Calculator
Find the buoyant force on a submerged object.
Bernoulli Equation Calculator
Find downstream pressure in a flowing fluid.
Free Fall Calculator
Find velocity and distance of a falling object.
Circular Motion Calculator
Find centripetal acceleration and force.
Moment of Inertia Calculator
Find the moment of inertia for common shapes.
Entropy Change Calculator
Find entropy change from heat and temperature.
Mole Calculator
Convert mass to moles and number of particles.
Percent Yield Calculator
Find the percent yield of a chemical reaction.
Theoretical Yield Calculator
Find the maximum product mass from the limiting reactant.
Molality Calculator
Find molality from moles of solute and kg of solvent.
Mole Fraction Calculator
Find the mole fraction of each component in a mixture.
Avogadro's Number Calculator
Convert between moles and number of particles.
Boiling Point Elevation Calculator
Find how much a solute raises the boiling point.
Freezing Point Depression Calculator
Find how much a solute lowers the freezing point.
Normality Calculator
Convert molarity to normality using the n-factor.
Percent Composition Calculator
Find the mass percent of an element in a compound.
Osmotic Pressure Calculator
Find the osmotic pressure of a solution.
Buffer pH Calculator
Find buffer pH with the Henderson-Hasselbalch equation.
Hooke's Law Calculator
Find spring force and stored energy from displacement.
Pendulum Calculator
Find the period and frequency of a simple pendulum.
Snell's Law Calculator
Find the refraction angle as light crosses a boundary.
RC Time Constant Calculator
Find the time constant of a resistor-capacitor circuit.
Drag Force Calculator
Find the aerodynamic drag force on a moving object.
Friction Force Calculator
Find the friction force from the coefficient and normal force.
Impulse Calculator
Find impulse and momentum change from force and time.
Elastic Potential Energy Calculator
Find the energy stored in a stretched or compressed spring.
Angular Velocity Calculator
Find angular velocity in rad/s and rpm from angle and time.
Wave Speed Calculator
Find wave speed from frequency and wavelength.
Photon Energy Calculator
Find a photon's energy from its wavelength or frequency.
Partial Pressure Calculator
Find a gas's partial pressure with Dalton's law.
Wavelength Frequency Calculator
Convert between wavelength and frequency of a wave.
Specific Gravity Calculator
Find a substance's specific gravity from density.
Sound Intensity Calculator
Find sound intensity and level from power and area.
PPM Calculator
Find concentration in parts per million.
Boyle's Law Calculator
Find final gas pressure at constant temperature.
Gay-Lussac's Law Calculator
Find final gas pressure at constant volume.
Centripetal Force Calculator
Find the force keeping an object in circular motion.
Orbital Period Calculator
Find how long an object takes to complete an orbit.
Avogadro's Law Calculator
Find gas volume change with amount of gas.
Titration Calculator
Find an unknown concentration from a titration.
Angular Acceleration Calculator
Find angular acceleration from change in speed.
Kinetic Friction Calculator
Find the friction force on a sliding object.
Pressure Calculator
Find pressure from force and area.
Flow Velocity Calculator
Find fluid velocity from flow rate and area.
pOH Calculator
Find pOH from hydroxide concentration or pH.
Henderson-Hasselbalch Calculator
Find buffer pH from pKa and the base/acid ratio.
De Broglie Wavelength Calculator
Find the matter wavelength of a moving particle.
Lens Equation Calculator
Find image distance and magnification for a lens.
Magnification Calculator
Find magnification from object and image distances.
Bernoulli Equation Calculator
Find the pressure terms in Bernoulli's equation.
Hubble's Law Calculator
Find a galaxy's recession velocity from distance.
Orbital Velocity Calculator
Find the speed needed to orbit a body.
Schwarzschild Radius Calculator
Find the event horizon radius of a black hole.
Redshift Calculator
Find redshift and recession velocity from wavelengths.
Stellar Luminosity Calculator
Find a star's luminosity from radius and temperature.
Apparent Magnitude Calculator
Find apparent magnitude from absolute magnitude and distance.
Parallax Distance Calculator
Find a star's distance from its parallax angle.
Light Travel Time Calculator
Find how long light takes to travel a distance.
Mechanical Advantage Calculator
Find mechanical advantage, velocity ratio and efficiency.
Graham's Law Calculator
Compare gas effusion rates by molar mass.
Mass Percent Calculator
Find the mass percent of a solution.
Limiting Reagent Calculator
Find the limiting reactant in a reaction.
Atom Economy Calculator
Measure how efficiently a reaction uses atoms.
Rate Constant Calculator
Find a reaction rate constant with Arrhenius.
Enthalpy of Reaction Calculator
Find reaction enthalpy from formation enthalpies.
Solution Concentration Calculator
Find concentration in grams per liter.
Gas Density Calculator
Find gas density from the ideal gas law.
Equilibrium Constant Calculator
Calculate Kc from equilibrium concentrations.
Percent Purity Calculator
Find the purity of a chemical sample.
Specific Gas Constant Calculator
Find the specific gas constant from molar mass.
Molar Volume Calculator
Find the molar volume of an ideal gas.
Average Atomic Mass Calculator
Find average atomic mass from isotopes.
Mole Ratio Calculator
Convert moles between substances in a reaction.
Real Estate
Cap Rate Calculator
Measure a rental property's return from income and price.
Rent vs Buy Calculator
Compare the monthly cost of renting against owning.
Loan-to-Value (LTV) Calculator
Find your LTV ratio, equity, and equity percentage.
Down Payment Calculator
Turn a home price and percentage into cash and loan amounts.
Closing Costs Calculator
Estimate the fees you pay to finalize a home purchase.
Property Tax Calculator
Estimate annual and monthly property tax from assessed value.
Mortgage Refinance Calculator
See your new payment, monthly savings, and break-even point.
Price Per Square Foot Calculator
Turn a property price and size into a per-square-foot figure.
Gross Rent Multiplier (GRM) Calculator
Screen rental deals by dividing price by annual gross rent.
Cash-on-Cash Return Calculator
Measure the annual cash return on the cash you actually invested.
Net Operating Income (NOI) Calculator
Find a property's income after operating expenses, before financing.
Vacancy Rate Calculator
Find the share of units sitting empty and your occupancy rate.
Rent Affordability Calculator
Find the maximum monthly rent your income comfortably supports.
Mortgage Payoff Calculator
See how many months to clear your loan and the interest it costs.
Home Appreciation Calculator
Project a home's future value and gain from an annual growth rate.
Rental Property ROI Calculator
Measure a rental's annual return relative to its purchase price.
Seller Net Proceeds Calculator
See what you walk away with after paying off the loan and costs.
DSCR Calculator
Find the debt service coverage ratio for a property.
Debt Yield Calculator
Find the debt yield on a commercial loan.
Price-to-Rent Ratio Calculator
Compare home prices to rent to gauge buy vs rent.
1% Rule Calculator
Check a rental against the real estate 1% rule.
Mortgage Recast Calculator
See your new payment after a lump-sum recast.
Home Equity Calculator
Find your home equity and borrowable amount.
Rent Increase Calculator
Find your new rent after a percentage increase.
Security Deposit Interest Calculator
Find the interest owed on a security deposit.
Property Tax Proration Calculator
Split property tax between buyer and seller at closing.
HOA Fee Cost Calculator
Project HOA fees over time with annual increases.
House Flip Profit Calculator
Estimate profit and ROI on a house flip.
70% Rule Calculator
Find the max offer for a house flip.
Rental Cash Flow Calculator
Find monthly cash flow on a rental property.
Rehab ROI Calculator
Find the return on a renovation project.
Automotive
Fuel Cost Calculator
Estimate the fuel cost of any trip.
MPG Calculator
Work out your real fuel economy.
EV Savings Calculator
Compare EV and gas running costs.
Tire Size Calculator
Decode a P-metric tire size.
Car Loan Calculator
Estimate your monthly car payment.
Horsepower Calculator
Convert torque and RPM into horsepower.
Engine Displacement Calculator
Find engine size from bore, stroke, and cylinders.
Tire Pressure Temperature Calculator
See how temperature shifts your tire pressure.
Towing Capacity Calculator
Estimate how much your vehicle can safely tow.
Fuel Savings Calculator
Compare yearly fuel costs of two vehicles.
MPG to L/100km Converter
Convert miles per gallon into litres per 100 km.
Car Lease Payment Calculator
Estimate a monthly car lease payment.
Car Cost Per Mile Calculator
Find the true cost of every mile you drive.
Tire Diameter Calculator
Find a tire's overall diameter in inches.
Speedometer Error Calculator
See true speed after a tire size change.
Trip Fuel Calculator
Estimate the gallons a trip will need.
Oil Change Cost Calculator
Estimate your yearly oil change spending.
Car Payment Affordability Calculator
See how much car payment you can afford.
EV Range Calculator
Estimate an electric car's driving range.
Horsepower to Torque Calculator
Convert horsepower to torque at a given RPM.
Axle Ratio Calculator
Find the axle (final drive) ratio from gear teeth.
E85 Ethanol Mix Calculator
Find how much E85 and pump gas to hit a blend.
EV Charging Time Calculator
Find how long it takes to charge an EV battery.
Oil Change Interval Calculator
Track miles left until your next oil change.
Vehicle Wrap Cost Calculator
Estimate the cost to wrap a vehicle.
Gas vs Electric Car Calculator
Compare annual fuel cost of gas and electric cars.
Quarter Mile Calculator
Estimate quarter-mile ET and trap speed.
Torque Wrench Extension Calculator
Adjust wrench setting when using an extension.
Mileage Reimbursement Calculator
Calculate reimbursement for business miles driven.
Payload Capacity Calculator
Find a vehicle's payload from GVWR and curb weight.
Stopping Distance Calculator
Estimate reaction and braking distance by speed.
Coolant Mix Calculator
Find antifreeze and water for a coolant mix.
Cooking
Recipe Scaler Calculator
Scale any recipe up or down by servings.
Baking Conversion Calculator
Convert cups to grams for common baking ingredients.
Cooking Time Calculator
Estimate roasting time by meat type and weight.
Butter Converter Calculator
Convert butter between sticks, cups, tablespoons, ounces and grams.
Oven Temperature Converter
Convert oven temperatures between Celsius, Fahrenheit and gas mark.
Yeast Converter Calculator
Convert between fresh, active dry and instant yeast by weight.
Coffee-to-Water Ratio Calculator
Find the coffee dose for your water from a brew ratio.
Recipe Servings Calculator
Rescale an ingredient for a new number of servings.
Calories per Serving Calculator
Divide a recipe's total calories by its servings.
Dough Hydration Calculator
Calculate baker's hydration from flour and water weights.
Brine Calculator
Find the salt weight for a brine at any concentration.
Meat Roasting Time Calculator
Estimate roasting time from weight, rate and resting.
Pizza Dough Calculator
Get flour, water, salt and yeast for your pizza dough balls.
Baking Substitution Calculator
Convert an ingredient amount to a common substitute.
Air Fryer Conversion Calculator
Convert oven temperature and time to air fryer settings.
Thawing Time Calculator
Estimate safe fridge and cold-water thaw times by weight.
Oven Temperature Conversion Calculator
Convert oven temps between °C, °F and gas mark.
Sourdough Starter Calculator
Find flour and water to feed your starter.
Pan Size Conversion Calculator
Scale a recipe when changing baking pan sizes.
Honey to Sugar Calculator
Convert sugar to honey when baking or cooking.
Coffee Ratio Calculator
Find the coffee grams for your water and ratio.
Rice Water Ratio Calculator
Find the water needed to cook rice by type.
Pizza Size Comparison Calculator
Compare two pizzas by price per square inch.
Turkey Cooking Time Calculator
Find how long to roast a turkey by weight.
Cake Serving Calculator
Find how many servings a cake pan yields.
Keg Servings Calculator
Find how many drinks a keg pours.
Cocktail Dilution Calculator
Find the final ABV after diluting a cocktail.
Wine Per Guest Calculator
Find how many wine bottles you need for a party.
Brine Ratio Calculator
Find the salt needed for a brine solution.
Meat Per Person Calculator
Find how much meat to buy for your guests.
Baker's Percentage Calculator
Express ingredients as a percentage of flour.
Cups to Grams Calculator
Convert cups to grams using ingredient density.
Grams to Cups Calculator
Convert grams to cups using ingredient density.
Cake Pan Conversion Calculator
Scale batter between different cake pan sizes.
Frosting Calculator
Estimate how much frosting a cake needs.
Ganache Ratio Calculator
Find the cream needed for chocolate ganache.
Simple Syrup Calculator
Find the sugar needed for simple syrup.
Prime Rib Cooking Time Calculator
Estimate roasting time for prime rib.
Brisket Cooking Time Calculator
Estimate smoking time for brisket.
Ham Cooking Time Calculator
Estimate heating time for a ham.
Marinade Calculator
Find how much marinade you need for meat.
Egg Substitute Calculator
Convert eggs to common baking substitutes.
Meringue Calculator
Find the sugar needed for meringue.
Whipped Cream Calculator
Find whipped cream yield and sugar needed.
Engineering
Gear Ratio Calculator
Find gear ratio, output speed and torque.
Voltage Divider Calculator
Find output voltage and current of a divider.
Spring Constant Calculator
Find spring stiffness and stored energy.
Stress Strain Calculator
Find stress, strain and Young's modulus.
Motor Power Calculator
Convert torque and RPM to horsepower and kW.
Beam Deflection Calculator
Find deflection of a uniformly loaded beam.
Reynolds Number Calculator
Find Reynolds number and flow regime.
Power Dissipation Calculator
Find power dissipated by a resistor.
Resistor Calculator
Combine two resistors in series or parallel.
Capacitor Energy Calculator
Find energy stored in a capacitor.
Belt Length Calculator
Find belt length for a two-pulley drive.
Hydraulic Pressure Calculator
Find pressure from force over area.
Safety Factor Calculator
Find the factor of safety of a design.
Heat Transfer Rate Calculator
Find conductive heat flow through a wall.
Shaft Power Calculator
Find mechanical power from torque and RPM.
Pipe Flow Rate Calculator
Find volumetric flow rate in a pipe.
Pump Power Calculator
Find hydraulic power a pump must deliver.
LED Resistor Calculator
Find the series resistor for an LED circuit.
Bolt Torque Calculator
Find the tightening torque for a bolt preload.
Pipe Flow Rate Calculator
Find flow rate from pipe diameter and velocity.
Voltage Drop Calculator
Find voltage drop over a wire run.
Young's Modulus Calculator
Find a material's stiffness from stress and strain.
Resonant Frequency Calculator
Find the resonant frequency of an LC circuit.
Inductance Calculator
Find the inductance of a solenoid coil.
Capacitor Charge Calculator
Find the charge and energy stored in a capacitor.
Resistors in Parallel Calculator
Find the total resistance of parallel resistors.
Resistors in Series Calculator
Find the total resistance of series resistors.
Electric Field Calculator
Find the electric field from a point charge.
Watts to Amps Calculator
Convert electrical power in watts to current in amps.
Amps to Watts Calculator
Convert electrical current in amps to power in watts.
Shear Stress Calculator
Find shear stress from force and area.
Bending Stress Calculator
Find bending stress from moment, distance and inertia.
Shaft Torsion Calculator
Find torsional shear stress in a circular shaft.
Pulley RPM Calculator
Find driven pulley RPM from diameters and drive speed.
Hydraulic Cylinder Force Calculator
Find the force a hydraulic cylinder produces.
Pipe Pressure Drop Calculator
Find pressure loss in a pipe (Darcy-Weisbach).
Wire Resistance Calculator
Find a wire's resistance from length and area.
Transformer Turns Ratio Calculator
Find turns ratio and secondary turns of a transformer.
Three-Phase Power Calculator
Find three-phase power from voltage, current and PF.
Motor Torque Calculator
Find motor torque from power and speed.
Inductor Energy Calculator
Find the energy stored in an inductor.
Power Factor Correction Calculator
Find the capacitor kVAR to improve power factor.
Capacitive Reactance Calculator
Find capacitive reactance from frequency and capacitance.
Sports
One Rep Max Calculator
Estimate your 1RM from a set and reps.
VO2 Max Calculator
Estimate aerobic fitness from the Cooper test.
Swim Pace Calculator
Find your pace per 100 m and swimming speed.
Calorie Burn Calculator
Estimate calories burned from any activity.
Race Time Predictor
Predict a race time from a known result.
Steps to Distance Calculator
Convert your step count into kilometres and miles.
Cycling Speed Calculator
Find your average cycling speed in km/h and mph.
FFMI Calculator
Measure muscularity with fat-free mass index.
Golf Handicap Calculator
Find the handicap differential of a round.
Points Per Game Calculator
Work out a scoring average across games.
Batting Average Calculator
Compute a baseball batting average.
Elo Rating Calculator
Update a player's Elo after a match.
Running Calories Calculator
Estimate calories burned on a run from weight and distance.
Marathon Time Predictor
Predict your marathon time from a recent race result.
Race Finish Time Calculator
Work out your finish time from distance and target pace.
Power-to-Weight Ratio Calculator
Calculate cycling power-to-weight in watts per kilogram.
Target Pace Calculator
Find the pace you need to hit a goal time.
Swim Pace per 100 Calculator
Find your swim pace per 100 metres from a swim.
Wilks Score Calculator
Compare powerlifting strength across bodyweights.
Race Split Calculator
Find the split time for part of a race at even pace.
Cycling Calories Calculator
Estimate calories burned cycling using MET values.
Stride Length Calculator
Estimate your stride length and steps per kilometre.
ERA Calculator
Find a pitcher's earned run average.
Passer Rating Calculator
Find an NFL quarterback's passer rating.
Cycling Power Calculator
Estimate the power needed to ride at a speed.
Slugging Percentage Calculator
Find a hitter's slugging percentage (SLG).
On-Base Percentage Calculator
Find a hitter's on-base percentage (OBP).
Winning Percentage Calculator
Find a team's winning percentage from its record.
Free Throw Percentage Calculator
Find shooting percentage from makes and attempts.
Running Splits Calculator
Find your pace per mile and km from distance and time.
Fantasy Football Points Calculator
Calculate PPR fantasy points from a stat line.
Field Goal Percentage Calculator
Find shooting percentage from makes and attempts.
Save Percentage Calculator
Find a goalie's save percentage from saves and goals.
Goal Differential Calculator
Find goal differential and per-game average.
Watts per Kg Calculator
Find your cycling power-to-weight ratio.
WHIP Calculator
Calculate a pitcher's WHIP in baseball.
Completion Percentage Calculator
Calculate a quarterback's completion percentage.
Yards per Carry Calculator
Calculate a running back's yards per carry.
Fielding Percentage Calculator
Calculate a baseball fielding percentage.
Three-Point Percentage Calculator
Calculate a basketball 3-point percentage.
Pythagorean Expectation Calculator
Estimate a team's expected win percentage.
Technology
Download Time Calculator
Estimate how long a file takes to download.
Hosting Bandwidth Calculator
Estimate monthly bandwidth for a website.
IP Subnet Calculator
Find hosts and addresses from a CIDR prefix.
Screen PPI Calculator
Find pixel density from resolution and size.
Video Bitrate Calculator
Estimate video file size from bitrate.
Uptime SLA Calculator
Convert an uptime percentage into allowed downtime.
Aspect Ratio Calculator
Reduce a width and height to a simple ratio.
Password Strength Calculator
Estimate password entropy in bits from length and character set.
Hex to RGB Converter
Convert a hex color code into RGB values.
Image File Size Calculator
Estimate an uncompressed image's size from its dimensions.
PX to REM Converter
Convert pixels to rem and em for responsive CSS.
Typing Speed Calculator
Measure gross and net words per minute with accuracy.
Cloud Storage Cost Calculator
Estimate monthly and total cloud storage bills.
API Rate Limit Calculator
Project total API requests from a per-second rate.
Network Latency Calculator
Estimate propagation delay over a distance and medium.
Bandwidth Cost Calculator
Estimate monthly and annual data transfer costs.
Compression Ratio Calculator
Find the ratio and percentage saved after compression.
Data Usage Calculator
Estimate monthly and yearly data use from streaming hours.
Video File Size Calculator
Estimate a video's file size from its bitrate and length.
SSD Lifespan Calculator
Estimate an SSD's life in years from its endurance rating.
Color Contrast Ratio Calculator
Check WCAG contrast between two hex colors for accessibility.
Binary to Decimal Converter
Convert numbers between binary, decimal, and hexadecimal.
Subnet Hosts Calculator
Find usable and total IP addresses from a CIDR prefix.
Webpage Load Time Calculator
Estimate how long a page takes to load at a given speed.
Email Storage Calculator
Project how much storage your email will use over years.
Device Battery Life Calculator
Estimate battery runtime from capacity and current draw.
Print Size Calculator
Find the print dimensions of an image at a given DPI.
Bandwidth Calculator
Find total bandwidth needed for concurrent users.
Password Entropy Calculator
Measure password strength in bits of entropy.
PPI Calculator
Find a display's pixel density (pixels per inch).
Decibel Calculator
Convert a power or amplitude ratio to decibels.
Battery Life Calculator
Estimate battery runtime from capacity and load.
Watt-Hours Calculator
Convert battery amp-hours and voltage to watt-hours.
Data Transfer Cost Calculator
Find the monthly and annual cost of data transfer.
API Token Cost Calculator
Estimate LLM API cost from input and output tokens.
Base64 Size Calculator
Find the encoded size and overhead of Base64.
ASCII Code Calculator
Convert a character to decimal, hex and binary codes.
Photo Storage Capacity Calculator
Find how many photos fit in your storage.
Color Blend Calculator
Mix two hex colors at any ratio.
Upload Time Calculator
Estimate how long a file takes to upload.
Print Resolution Calculator
Find print size from pixels and DPI.
Video Frames Calculator
Count total frames in a video clip.
GPU Framebuffer Memory Calculator
Estimate framebuffer VRAM for a resolution.
Audio File Size Calculator
Estimate audio file size from bitrate.
Megapixels Calculator
Find megapixels from image dimensions.
RGB to Hex Calculator
Convert RGB color values to a hex code.
Refresh Rate Calculator
Convert refresh rate to frame time.
Data Cap Calculator
Find your daily data allowance from a monthly cap.
Render Time Calculator
Estimate total render time from frame count.
Screen Size Calculator
Find screen dimensions from diagonal and ratio.
Speech Time Calculator
Estimate speaking time from a word count.
Cache Hit Ratio Calculator
Find cache hit and miss ratios.
PSU Wattage Calculator
Find the recommended power supply wattage.
Environment
Carbon Footprint Calculator
Estimate yearly CO₂ from driving and home electricity.
Solar Savings Calculator
Estimate annual and lifetime savings from solar panels.
Flight Emissions Calculator
Estimate CO₂ from a flight by distance and passengers.
Home Energy Cost Calculator
Find what an appliance costs to run per month and year.
EV Charging Cost Calculator
Estimate the cost to charge an electric vehicle.
Water Footprint Calculator
Estimate your shower water use per week and year.
Tree Carbon Offset Calculator
Find how many trees offset your yearly CO₂ emissions.
Recycling Impact Calculator
Estimate the CO₂ you save by recycling household materials.
Rainwater Harvesting Calculator
Estimate how much rainwater your roof can collect each year.
LED Savings Calculator
See what switching to LED bulbs saves per year.
Driving Emissions Calculator
Estimate the CO₂ a car trip or year of driving produces.
Diet Carbon Footprint Calculator
Estimate the yearly CO₂ from your meat and dairy diet.
Household Water Usage Calculator
Estimate your household's daily and yearly water use.
Wind Turbine Output Calculator
Estimate the power a wind turbine generates at a given wind speed.
Compost Impact Calculator
See how much food waste and CO₂ composting diverts each year.
Plastic Footprint Calculator
Estimate your yearly plastic use and its carbon cost.
Standby Power Calculator
Find the cost and CO₂ of devices left on standby.
Solar Panel Output Calculator
Estimate daily and yearly solar energy output.
Flight Carbon Footprint Calculator
Estimate the CO₂ emissions of a flight.
Wind Turbine Power Calculator
Estimate the power output of a wind turbine.
Driving Carbon Footprint Calculator
Find the CO₂ emissions from your annual driving.
Compost Ratio Calculator
Balance browns and greens in your compost.
Recycling Deposit Savings Calculator
Find your refund from recycling deposit containers.
Shower Water Usage Calculator
Find water and cost from your shower habits.
Plant Spacing Calculator
Find how many plants fit in a garden bed.
Irrigation Run Time Calculator
Find how long to run sprinklers for target watering.
Water Savings Calculator
Estimate water saved by a low-flow fixture.
Heat Pump Savings Calculator
Compare heat pump vs resistance heating cost.
Insulation Savings Calculator
Estimate heating savings from added insulation.
Thermostat Setback Calculator
Estimate savings from thermostat setback.
Solar Payback Calculator
Find how long solar panels take to pay off.
Logistics
Dimensional Weight Calculator
Find dimensional and billable shipping weight.
CBM Calculator
Calculate cubic metres and volumetric weight.
Pallet Count Calculator
Work out how many pallets an order needs.
Freight Density Calculator
Calculate freight density in pounds per cubic foot.
Landed Cost Calculator
Total the true cost of imported goods.
Container Loading Calculator
Find how many containers your cargo needs.
Cost Per Mile Calculator
Find your trucking cost per mile.
Fuel Surcharge Calculator
Add a fuel surcharge to a base freight rate.
Delivery Time Estimator
Estimate delivery time from distance and speed.
Truck Load Utilization Calculator
Measure how full your truck is by volume.
Warehouse Space Calculator
Estimate warehouse floor space for pallets.
Order Picking Time Calculator
Estimate how long an order takes to pick.
Safety Stock Calculator
Calculate buffer inventory to avoid stockouts.
Freight Class Calculator
Find shipment density for LTL freight class.
Chargeable Weight Calculator
Find air freight chargeable weight.
Pallet Stack Height Calculator
Find the total height of a loaded pallet.
Order Fill Rate Calculator
Find the percentage of demand you fulfilled.
Warehouse Capacity Calculator
Find usable storage volume and pallet positions.
Freight Cost Per Mile Calculator
Find total freight cost and cost per mile.
Delivery ETA Calculator
Estimate delivery time from distance and speed.
Shipping Cost Per Kg Calculator
Find total shipping cost and cost per kilogram.